drivers/sh/pm_runtime.c

   1 /*
   2  * Runtime PM support code
   3  *
   4  *  Copyright (C) 2009-2010 Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/kernel.h>
  13 #include <linux/io.h>
  14 #include <linux/pm_runtime.h>
  15 #include <linux/pm_domain.h>
  16 #include <linux/pm_clock.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/clk.h>
  19 #include <linux/sh_clk.h>
  20 #include <linux/bitmap.h>
  21 #include <linux/slab.h>
  22
  23 static struct dev_pm_domain default_pm_domain = {
  24         .ops = {
  25                 USE_PM_CLK_RUNTIME_OPS
  26                 USE_PLATFORM_PM_SLEEP_OPS
  27         },
  28 };
  29
  30 static struct pm_clk_notifier_block platform_bus_notifier = {
  31         .pm_domain = &default_pm_domain,
  32         .con_ids = { NULL, },
  33 };
  34
  35 static int __init sh_pm_runtime_init(void)
  36 {
  37         if (IS_ENABLED(CONFIG_ARCH_SHMOBILE_MULTI)) {
  38                 if (!of_find_compatible_node(NULL, NULL,
  39                                              "renesas,cpg-mstp-clocks"))
  40                         return 0;
  41                 if (IS_ENABLED(CONFIG_PM_GENERIC_DOMAINS_OF) &&
  42                     of_find_node_with_property(NULL, "#power-domain-cells"))
  43                         return 0;
  44         }
  45
  46         pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
  47         return 0;
  48 }
  49 core_initcall(sh_pm_runtime_init);